Tyhurst was born on April 26, 1930 in Brooklyn, New York. She graduated
from Parson's School of Design in 1949 where she majored in costume design.
She worked in the garment industry fro 15 years. She then moved to Chicago
where she got married and lived there for 5 years. In 1968 Marge moved to
California. There she went to Valley College and studied graphic design
while working for a local newspaper. After her husband Howard passed away
she moved into Leisure World in 1993. She started lapidary in 1995 and in
2000 remarried to Robert Tyhurst.